Attack Mode
If a dog’s afraid, it doesn’t take much to provoke it. Mostly when they think you are quite getting close to them, they attack you. The very reason why dogs act that way is that they do see you as a threat to their safety. It does take time to earn their trust; it is not something that you can rush. If you do so, you’ll probably be in danger.
Bribery
The pair brought a cheeseburger to make it much more manageable. They anticipated using the snacks as a lure to take the dog out from the hiding spot. It is not so dissimilar from fishermen who use tricks to entice fish! They needed it since they know that just by interacting and talking to the dog won’t do much. If they wait until the dog comes out, they would probably waste their time.